I have a few test pages running with an xhtml Mobile doctype declared.

I've been able to view these pages with a Nokia 7250 and 6610. In trying to confirm that the devices were not 'i' versions (with xhtml browsers) i got a ua header from the apache logs for the 6610:
Nokia6610/1.0 (4.74) Profile/MIDP-1.0 Configuration/CLDC-1.0 UP.Link/

My question: if this is the 6610 and not the 6610i, then how can it render the pages with an xHTML Mobile doctype? I thought that the WML 1.3 browser would error on such a document.

Can anyone offer any wisdom?

Thanks in advance.